Hi again,
and this is what I found on google search about popping/ snapping hips:
http://headsuponyourbody.blogspot.com/2008/03/hip-popping-during-pilates.html
http://www.caringmedical.com/conditions/Snapping_Hip_Syndrome.htm
notice it also talks about bursitis with the hips popping/ snapping.
I think you should get a referral for an appointment with a rhumy doctor just to start asking some questions about it, I also have popping sounds in my hips for ablout a year now, But I also have degenerative disc desease, and bulging disc sometimes.. and now hip bursitis.. and bone spurs, and OA at L5 S1..
I thought the popping on my hips was due to the recent finding with the hip bursitis, being they are called bursa sacks.. again please let your regular doctor know what is going on, you don't need any of this what I and many people have. it's really bad to deal with.